1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66226c55c38f24a5d55e64e4c2f82387bc53b20b5cb0247e91bdef50770be105. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3f5d438d-752d-4656-b8c9-4ffc73ccfdb2.json and https://artists.proofprofile.net/proofs/artist/3f5d438d-752d-4656-b8c9-4ffc73ccfdb2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1c899dc3afb0bfbdc09871d1f1c993d413134c2469bcb1f1e344fea3be8b35. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCPT2521107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f31b79127f8e7a0547f2050d9f028ecdd502a3b2c66fd269e9e8be6f00da8f. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCPT2521103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc528dd2ec7b7ab74a59efd8dae39d25daa07cb9cf3eba6f36767fb0714192f5. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCPT2521104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca61bd386416fe1d2f47faf9d5ecd6c51573e0d78ae30cde10dd806ec0cb292. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCPT2521112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93d5244cb622929dabb3b7db68a3e6fbfbbc116b62d913a9eedd217aef3a59f. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCPT2521101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b324a0f59c8959212c523e93c7f00c1b0d2fecee8ad4d52e8103aa0b7b3399. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:41:43Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCPT2521102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc528dd2ec7b7ab74a59efd8dae39d25daa07cb9cf3eba6f36767fb0714192f5. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCPT2521104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca61bd386416fe1d2f47faf9d5ecd6c51573e0d78ae30cde10dd806ec0cb292. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCPT2521112.